No. 4.?. 



CALAMAGROSTIS PURPURASCENS \l. J'.r. in Iti.liMidson, I'.ot. 



Ajipx. Franklin's \'()y. ■">. 



I'lii/il iicrcnnial. tiiltcil, willi ratlicr coarse woolly roots. 



Culms erect, simple, smooth and shininu or slif;iitly liisjiid near tin- noiics, 1! to 2.^ 

 feet lil^'li. 



Lcarix of niliii usually 3; slifatlis striate. liis))i(hilows, or nearly sniootli, niueli 

 shorter than the internodes; blades flat, involute toward the attenuate points, flexible, 

 his])i(lnl()us. (J to 10 iiK'lies lonjr; lij;ule lacerate or tim])riate, obtuse, 2 lines lonj;'. 



liiflorcsmncc a closely flowered, erect, narrow panicle, .'i to 4 incLes lonji, >^ inch 

 thick; rays crowded in U» to lli clusters, appressed, une<)ual, f( inch long or less, the 

 longer spikelet-boarinji' beyond the middle, the shorter crowded with S])ikelets to the 

 base. 



Spihlrts on pedicels halt' as long as themselves, turgid, acute. 2 lines long; enijjty 

 glumes lanceolate, acute, smooth, i)ur))le at apex or throughout; first glume carinate, 

 1-ntMved; second glume (-onvex, distinctly 3 iierved,2 lines long; tloral glume oblong, 

 ero.se at the ol)tuse apex, smooth, 4 nerved, li lines long; awn attached j way from 

 the base, -' lines long; hairs of the rudiment unc(puil, half as long as the glume, those 

 of the callus scanty and shorter; palet oblong, obtuse, thin, 2-nerved, U lines long. 



I'LA'J'E XLIII: ti. spikelet eidargcd 7 times: /y, empty glumes; r, f.oral glume, side 

 view; d. palet, dorsal view. 



Alaska and British America, extending south in the Ca.scade Jlountains lo Wa.sh- 

 ington. 



